The leaders of Japan and Qatar have affirmed their cooperation in stabilizing the global energy market, which has been rattled by Russia's invasion of Ukraine.

Prime Minister Kishida Fumio spoke by phone on Wednesday with Sheikh Tamim bin Hamad Al Thani.

Qatar is one of the world's leading exporters of liquid natural gas.

Kishida described the Russian invasion as a breach of Ukraine's sovereignty and territorial integrity, and a grave violation of international law. He said it's a serious situation that shakes the basis of order not only in Europe but the entire international community.

Kishida expressed hope for Qatar's contribution in responding to the surge in resource prices as fighting continues in Ukraine.